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Worm Gears

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The spur gear comes into contact with the worm at its threaded middle section. If the spur turns, it causes the worm to rotate. If the worm rotates, it causes the spur to turn. Read More…

Worm Gears Worm gears are the combination of a simple spur gear and a worm. A worm is a threaded metal rod that looks like a screw. Worms distinguish themselves from screws in that they are only machined in the middle; the threads do not begin or end at either end of the rod.
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Leading Manufacturers

Joliet, IL  |  800-876-7216

Omni G & M Corporation is a leading gear fabricator specializing in precision machined and custom solutions in a variety of sizes and types. Please check out Omni G & M’s website or call a friendly personnel member today!

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Omni Gear & Machine Corporation $$$

East Walpole, MA  |  800-491-1073

Gears are what we do best, and we are experts in our field. We have three generations of experience backing our company, and we use all of it to benefit you in any way possible.

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Commercial Gear & Sprocket Company, Inc. $$$

Syracuse, NY  |  315-488-0100

Gear Motions is a leading gear manufacturer specializing in supplying custom cut and ground gears. Our wide range of precision gear manufacturing capabilities and services deliver quality gears to meet almost any application.

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Gear Motions, Inc. $$$

Pewaukee, WI  |  262-542-4261

Precision Gears specializes in the manufacture of worms, worm gears, spur gears and helical gears. Our facility is complete with CNC turning, milling, broaching and grinding. We honor small and large production runs plus a variety of sizes and shapes. Having been in business since 1919, we encourage you to let our years of experience become a part of yours. We welcome all calls and inquiries.

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Precision Gears, Inc. $$$

Cleveland, OH  |  800-423-3169

Cleveland Gear Company has specialized in worm gear technology including industrial gears, bevel gears, helical gears, worm gears and precision gears since 1912. Applications include steel production, electric power generation, and material transport. Fulfilling your exact requirements is what has and continues to make Cleveland Gear one of the top manufacturers of gearing and enclosed gear drives.

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Cleveland Gear Company $$$

Englewood, NJ  |  201-568-2245

Acme Gear Company offers you over 85 years of specialized experience in the prototype and mass production of top quality precision ground or cut gears, machined products for original equipment manufacturers and the aerospace industry.

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Acme Gear Company, Inc. $$$

San Gabriel, CA  |  800-276-4327

Marples Gears is a manufacturer of precision gears. Our product offering includes spur, helical, spline, worm, metric gears and more. We are certified to MIL-I-45208 and MIL-STD-456962. We specialize in high-precision, fine-pitch gears for precise movement and positioning requirements. We’ve been serving aerospace, defense, optical, space, medical & commercial industries for 60 years.

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Marples Gears, Inc. $$$
placeholder image Omni Gear & Machine Corporation Commercial Gear & Sprocket Company, Inc. Gear Motions, Inc. Precision Gears, Inc. Cleveland Gear Company Acme Gear Company, Inc. Marples Gears, Inc.

Worm gears are used to transfer torque, just like all other industrial gears, but they are capable of transferring motion at odd angles or under unusual circumstances. The tuning pins of a string bass, for example, are connected to worms, which themselves are connected to gears. Those gears are connected to rods, which are themselves each connected to a string.

Custom Manufactured Worm Gears Worm Gears - Omni Gear & Machine Corporation

The worm gear is capable of resisting the tension of the string, keeping the instrument in tune. Worm gears are usually constructed of bronze, iron, or steel, but are available in a wide range of material options. Worm gears are not a recent advancement in torque transmission technology; original worm gear configurations were made of wood and were often attached to hand cranks.

Worm gears can transfer motion between axes. A gear's axis, in the case of a circular gear viewed at its face, extends from the middle of the circle out into the z axis. In the case of a worm, the axis goes through each end. The axes of worms and circular gears intersect each other when they are paired together. The transfer of torque between two axes is one of the defining features of a worm drive. Another defining feature is the control over that transfer that the configuration allows its users.

Worm drives can be used to either speed up or slow down the transfer of torque. They can also multiply or resolve torque or enhance the accuracy in positioning systems. Worm and spur teeth quantities, pitch diameters, face widths and lengths are all contributing factors to the performance of a worm gear. Power transmission requirements, noise and heat generation all depend on those configurations. For less demanding applications, some worm gears can be made of synthetic materials like nylon and other plastics.

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